Linked Questions

4
votes
1answer
5k views

Why are most mutations recessive? [duplicate]

Why are most of deleterious mutations recessive in nature? I understood that if it's recessive then one reason may be that the mutant gene doesn't code for a functional protein and so there is no ...
19
votes
6answers
5k views

Why are some genes dominant over others? What is the mechanism behind it?

If I have a brown eye gene which encodes the protein that is responsible for the brown color and have a blue eye gene as well, what is the reason that my eye color is brown? How does one gene maintain ...
10
votes
3answers
13k views

What makes a gene dominant or recessive [duplicate]

We all carry two copies of each gene (outside of male sex chromosomes). If the two differ from each other often one is dominant and one recessive. How does this mechanism work on a molecular level? ...
9
votes
2answers
2k views

Cause of hexadactylisim in Amish people

Is it caused by inbreeding of many generations within an isolated population?
5
votes
3answers
2k views

Difference between null and recessive allele?

I get that in a single gene locus, an individual can have RR, Rr, or rr as the two alleles ...
3
votes
2answers
2k views

Dominance coefficient

I am trying to understand the meaning of the dominance coefficient. I'll be more specific to what I don't understand, in a moment. Let $A_{11}$, $A_{12}$ and $A_{22}$ be genotypes with fitnesses $1$, $...
1
vote
2answers
429 views

Recessive is Dominant to Dominant?

If a gene has for instance three alleles, p, q, and r, then could p be dominant to q, q be dominant to r, but r be dominant to p? Can a gene that is recessive to one allele not be dominant to another ...
0
votes
2answers
119 views

Twins reproducing with each other ( just hypothetical)

If 2 twins (look exactly the same and also the genes which control their morphology, behaviour etc. are same and present at the same locus) produce an offspring , will their offspring be exact copy of ...
2
votes
2answers
125 views

How can individual strands of coat hair have only a single color when considering codominance?

I understand how codominance works. We have two (or more) alleles for one gene, neither having dominance over the other. They are both expressed independently, which means that different phenotypes ...
2
votes
2answers
57 views

Is complete dominance actually a genotypic process?

An example often stated for codominance is blood groups, where both alleles version of the protein is expressed and can be found in the cell membrane. An example of incomplete dominance often given ...